I have taken the test and I was diagnosed with adhd. Usually these is a large questionaire and then you talk to a physciatrist or just a normal doctor. Then they put you on a computer and a voice will say the word "One" or "Two" and the numbers 1 and 2 appear on the screen and you have to only click the mouse when you see or here 1. Thats the test I had atleast. Hope this helps